Why the Feds investigating 1MDB

[A] pictute of banks working side-by-side with 1MDB as it accumulated worrying levels of debt and became the subject of growing controversy which, in the words of the Swiss financial regulator, looks like a case of “blatant and massive corruption”. U.S. authorities have asked the banks to provide details of their dealings with the fund. At the very least, the 1MDB money trail will leave parts of Wall Street red-faced.